Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide. With more than 25,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science® to address the entire water cycle, protect and restore the environment, and design sustainable and resilient infrastructure.
Tetra Tech est un chef de file mondial dans les domaines de l'eau, de l'environnement et des infrastructures durables, offrant des services techniques et d'ingénierie de qualité supérieure pour des projets à l'échelle mondiale. Grâce à ses 25 000 employés, Tetra Tech propose des solutions optimales aux problèmes les plus complexes en utilisant la science d’abord pour répondre aux besoins en matière de cycle de l'eau, en protection et restauration de l'environnement ainsi qu’en conception d’infrastructures durables et résilientes.
We provide essential services in the water and waste sectors to preserve resources and improve quality of life wherever we operate. As a global player for over 160 years, we support public and private actors with resilient and innovative solutions.
With a presence in over 40 countries and 40,000 employees, we provide drinking water and sanitation services to millions of people. We operate across the whole water and waste supply chain, from infrastructure design to sustainable resource management.
Given the environmental challenges we face, we rely on the potential of digital technologies to help our clients reduce their environmental impact and improve the performance of their water and waste services.
Sulzer is a global leader in critical applications for core infrastructure and processes for large essential industries around the world. We ensure the security, quality and durability of critical goods and services by supporting energy security, natural resource management and efficiencies in process industries. This in turn supports the transition to a circular economy. Our integrated solutions add significant value by enabling energy efficiency, carbon emissions and pollution reduction, and process efficiency improvements. Customers benefit from our commitment to innovation, performance and quality through our responsive network of 160 world-class manufacturing facilities and service centers across the globe. Sulzer has been headquartered in Winterthur, Switzerland, since 1834. In 2025, our 13’500 employees delivered revenues of CHF 3.6 billion. Our shares are traded on the SIX Swiss Exchange (SIX: SUN).